2) If a debt-ceiling-related default were to occur, Moody's would likely downgrade the rating shortly thereafter. The extent of and length of time before a downgrade would depend on how factors surrounding the default affect the government's fundamental creditworthiness, including (a) the speed at which the default were cured, (b) an assessment of the effect of the default on long-term Treasury borrowing costs, and (c) measures put in place to prevent a recurrence. However, a rating in the Aa range would be the most likely outcome. Any loss to bondholders would likely be minimal or non-existent, as Moody's anticipates that a default would be cured quickly.

The bottom line: There is no such thing as a technical default. A default would kill the US AAA rating just like that.

Given that there's been a growing chorus of people who are attempting to minimize the significance of a "technical default", this is a huge point they've just clarified.